fix typo
add RabbitMQ to 1.1 and 1.2 server list
The RabbitMQ server supports STOMP 1.1 as of version 2.3.0 and 1.2 as
of version 3.0.0.
Merge pull request #61 from rade/master

add RabbitMQ to 1.1 and 1.2 server list